N.Y. Educ. Law § 488
Notwithstanding and in addition to any provisions for the redemption of bonds which may be contained in any contract with the holders of the bonds, either the state or the city of Yonkers may, upon furnishing sufficient funds therefor, require the fund to redeem, prior to maturity, as a whole, any issue of bonds on any interest payment date not less than twenty years after the date of the bonds of such issue at one hundred five per centum of their face value and accrued interest or at such lower redemption price as may be provided in the bonds in case of the redemption thereof as a whole on the redemption date. Notice of such redemption shall be published in at least two newspapers published and circulating in the city of Yonkers at least twice, the first publication to be at least thirty days before the date of redemption.
N.Y. Educ. Law § 488